Table 2. Subgroup analysis.

The pooled rate ratios of all-cause mortality were summarized by different subgroups.

Subgroups	N	Pooled rate ratios	I2	p-value
Long-term effects	8	1.09 (0.97–1.22)	93.72	0.154
CLR versus alternative antibiotics	6	1.06 (0.94–1.20)	95.34	0.330
- With comorbidities	3	1.10 (0.97–1.25)	0.00	0.135
- Without comorbidities	3	1.04 (0.82–1.30)	99.08	0.759
CLR versus placebo	2	1.24 (1.04–1.48)	0.00	0.015
Short-term effects
CLR versus alternative antibiotics	2	1.63 (1.13–2.37)	97.26	0.090

CLR, clarithromycin.